A cobpobation oe pennsyl



M. ZWICKY April 30, 1929.

NITED ST A BE I i' -IIEN-T OFFICE,-

This invention relates particulairl-y t'o so 'sh own by nQa'gement of its forked arm 15" 55 oalled strai ht orfullash xoried knittm%x w1th tl1e iran'1e projection A, The non-rochines Whil, a're made up f11. serios of; ittatable member 15 afleots t he rotation of thia t ing seotions- 0'perated from a ooxnmon cum: shaf t C. only through theautomatio action' 5 shaft; und it co nsists irijmproved mean's-for ofa teverse-motion stop device 16 eccentricalautomatioa'lly prer*enting h'9rmful reverso-ly pivoted thereto ab 17 and operative upon 60 turning movements f said shaft such as are a split brak e-ring 20 interp0sed between the incidental 'to stopp'mg of the normal rotamemhers, as hereinaftermore fully described. tion while the cams a.'re nder operating The s lit ring 20 is ada tod to fit within strains. The invention is flly 'de scribed in an over anging circular singe 10ofthe connec tidn with the accompanying dra.wing 'shaft-fixed member 10, with its end portions 5 and clearly defined in the si1bjoined claim. spreod so as to prbvide a, split-ga 20 be- Fig..-1 is a diagrammatic' view indioat ing tween them;' while the frame-fixe member knownparts of a stra.ight knitting machine has a hub portion 15 loosely projecting 15 with my invention applied-thereto. into sa.id ring and provided with a recess 15 Fig. 2 is a sectional elevation clearly shoW- for the pivoted rxngspreading device 16. 7 ing m invention in connection with a p0r-. The ti ortion 16" of the bitter is wedgeti0n 0 the drive shaft; the movable 'stop for sha"e as shown; and in the normal posit1on the brakg-ring spreading device lbeing illusof t e device. as shown in Fig. 3 und. indicated.

20 trated in prqected position. by;dottedlines in Fig. 4, it is se&ted against Fi 3 1s" a cross-sectional view of' the he -recess all 15 m non-radial 'osition, bmke-wheel members, on the line 3-3 ofFig. with said tip Portion projected into t e 'splitv 2; the spreading divioebeing in the nosition gap 20 of thoring, so as to prevent rotation assumed du ing normal rotatmn o:f the shafli' of the latter w'ith the freely rotatable shaft- 25 indicated by the a rrow. fixed ri1gmber 10. The device16 is Inovable Fig.4isa fragxnentaryview correspondmg from this normal osition only in case a rewith Fig. 3 but showing the ring-spreading, verse turiringaction is exerted upon the shaft diavice in an extreme brakingtp0s1tion, to- C und. its fiXed-memberl0. wardswhich it is sufllciently swung"by any As alreadfixmentioned,suoh ieverse-turning 30 reverse turnii1g action of the shocft. aotion occurs Wl1e1i tho -normal rotation o'f the y Fig. 1 indicates an ordinary knitting ma- -machine is stopp1e'd With cams B acting to opching. frame A, with the usual cam shaft B erate levers B sind the object is to promptly und. geared hand-wheeldriVe shaft C mountneutr'aljze such action by making the split od therein; a bam B, one of the number fiixed rin 20 Serve as a brake; this being uocom- 35 to said camShaft, being indicalted as acting .plis 1ed by the wedge action of the tip 16 enupon a lever B for desiredly niovirig certa'in gaged -in the split-gap 20. 'lhis action is mechanism when the shaft is n0rmally roclea'rly brought out in Fig. 4,where the nortated. The reaction of said lover upon the mal projection of the wedge-tip into the split cams actually tends to cause obmctionable .gap is -indi0ated in dotted lines, while .its

40 reverse turnings 'of the shq.ft when normal reater pro'etztion to spread the ring for driving is stopped; a.nd n}y 1mpr0vod mech- %1"aking is slxo wn in fulllines. This greater nism' for promptly s oppl g v r projection into the split-gap is caused by the tation is shown apphed to t he dr1ve shaft C, swinging oi the spreader device 16 on its pivwith ono momberthereof fixed to a frame porot 17 as soon as any reverse-turningadthn be- 45 tion Af by mea.ns of a forke'd arm 15" of 'ns; the fit of Lhe ring 20 in the overhanging said member. so that sa1d C may -be onge 10 of member 10 makingit partalkeof termitbently 'Wi th in'surance any-reverso -purni'ng tendency sufliciently to *r'evefse movement. cause thi s svinging of-the dvice 16 towatds "'wn in Figs. 2, 3, und 4, my 1ma positi0n radial to the shaft, with res ulting ch2'1nism comprises tw0 bml res read of the rin and gripping actio'n upon wheel me'ambers 10 und. 15 upon the dnve t emeamber 10 to rake the latter. It will be shait C; ighe member 10 being suita.bly fixed understood that this braking action is readily to sa.id shaft und the memlmr 15 previously made'eflectiVe With lass swing of the pivoted referred to, laeing fixed against rotation, as device 16 than is illustratively shown; und

provide a, plunger stop 25 mova that the resumption of normal rotativ e action j 1'1st as pro'mptly releases the b rake.

In order that reverse.turning movemerlt of the rhachine may be made p0ssible, it isneces-. sary that the ring-spreadingf device 16 be Fig. 2, 01 to be withdrawn therefrom for se-- curing automatic brake action as-described.

What I claim is:

In combination 'wi-th a frame-mounted shaft, of a reverse-turningbraking device for said shaft compris'ing' cO0peratingbrake-whdel members thereon, onebf which is fixed to 1'0- tate therewith and th6; other having a nonrotative engagement with the frame, and a the latter, a limitedly 'cess und having a wed flange portioh cf one" of said members enci1f cling an extending hub portion of the other membeiy a split.bfake-ring interposed between said flange and hub portions, a walled recess in movable brake-ringspreading de'vice pivotally mounted in said rebetv veen the 1erids 0 said split ring; sai d spread ing device being moved into idle 110D- m ing-spreading position against one wall 0f said recess by turning movement of the shaft in one direction, and being mve'd tothe opposite recess Wall by reverse s haft turning move- 1nent to further project its wdge shaped end in ring-spreading 'action, anda lock pin m0vable to retain sz 1 id spreading'device in idle Wall contact.

In testimony whereof, I hereto aflix my signature.

MELCHIOR ZWIOKY. v

p-shaped end projected v 

